Nuphar microphylla (Pers.) Fernald
Synonym: Nuphar pumila
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb
Status: E
Nuphar microphylla flowers G. E. Crow flowers

N. pumila of Michigan Flora.

In lakes, very local in Michigan. With its small flowers, small deeply lobed leaves, and extremely slender petioles rounded in cross-section (peduncles similarly slender), this is a quite distinctive plant.

Placed with the Eurasian N. pumila (Timm) DC. by many authors, but Padgett (2007) supports the recognition of N. microphylla. Individuals intermediate between this species and N. variegata, the leaves and flowers larger than in N. microphylla but stigmatic rays fewer than in N. variegata and a reddish disc, have been considered hybrids, N. ×rubrodisca Morong, by many authors. Plants matching this description are known in Michigan from Cheboygan, Chippewa, Keweenaw, Marquette, and Otsego Cos., but some of these are beyond the range of N. microphylla and may be just depauperate specimens of N. variegata.


Baraga County
Keweenaw County
    Only on Isle Royale
Luce County
Marquette County
Ontonagon County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 29, 2022.